4. Sheikh Mohammed bin Rashid Al Maktoum, $4.5 billion
According to a report by Forbes in 2010, Sheikh Mohammed bin Rashid Al Maktoum has seen his net worth plummet in recent years due to the heavy debt loads of the United Arab Emirates, of which he is the vice president. He is also the constitutional monarch of Dubai. As of 2010, his investment company Dubai Holding owed banks $12 billion.
As the Crown Prince of Dubai, he named his yacht – the third largest in the world – ‘Dubai’. He is interested in horse racing and owns horse-breeding operation Darley Stud; it is believed that he is the largest spender in the sport of horse racing.
3. Sheikh Mansour bin Zayed Al Nahyan, $4.9 billion
Sheikh Mansour bin Zayed Al Nahyan is the deputy prime minister of the United Arab Emirates and the half brother of the nation’s president.
He is also the minister of presidential affairs for Abu Dhabi. Sheikh Mansour is the chair of Al Jazira sports company which operates soccer, handball, volleyball and basketball teams in Abu Dhabi.
He also owns English soccer club Manchester City F.C, through the holding company City Football Group (parent company Abu Dhabi United Group). He is the chair of Abu Dhabi’s International Petroleum Investment Company.